Telephone set for communication in airplanes



Feb. 20, 1940. K. WENZKY TELEPHONE SET FOR COMMUNICATION IN AIRPLANESFiled Sept. 9, 1937 Patented, Feb. 20, 1940 UNITED STATES PATENT FFICTEKarl Wenzky,

Berlin, Germany,

assignor to Siemens Apparate und Maschinen Geseilschaft mitbeschrtinkter Haftung, Berlin, Germany, a

corporation of Germany Application September M1937, SerialNo. 163,077

In Germany September 7, 1936 4 Claims.

The present invention relates to telephone sets for communication inairplanes, and more particularly to an improved casing for receiversused in connection with aviators helmets and is directed generically tothe same subject matter as is disclosed in the copending application ofGerald Klein, Serial No. 150,429, filed June 26, 1937.

It is known to provide telephone receivers with a casing which enclosesthe ear and seals it against extraneous noises which might interferewith a clear undc rstanding. It further has been proposed to lessen thepressure which such enclosed receivers exert on the ear byemploylngintermediate rubber cushions or the like.

a According to the invention, a telephone re ceiver is enclosed by anouter shell-like casing and by an inner cover which surrounds the ear ofthe wearer and is so dimensioned that the car may freely lie therein.The cover has the shape of a cup or pot whose bottom is provided withone or more openings for the-passage of the sound and lies directly in'front of the telephone system. The cover consists preferably ofleather.

In the accompanying drawing is shown an em- 5 bodiment of the inventionin a sectional view. In this figure, 5 represents the pu't'er portion ofan aviators helmet or of a similar attachment}! the inner portionthereof consisting of a lining of yielding material, and 3 a telephonereceiver sys- 1 tom. A casing l covering the receiver is secured to thehelmet 5 by means of a spring ring 6. The casing has preferably the formof an oval shell,

in the central circular flange 2 of which are fitted the telephonesystem3 and the diaphragm with 5 the cover 4." 'The lining 1 covering theinner side of the helmet 5' extends only to the edge oithe casing I, sothat the opening of the casing remains free. This opening is closed by apotshaped cover 8 of leather or similar absorbing material. The cover 8is firmly secured between the lining I and the helmet 5 as shown in thedrawing and the bottom thereof lies directly in front of the telephonesystem 3,'from which pass the sound wavesto the ear of the userthroughan 5 opening 9 arranged in the bottom of the cover 8. As will be seenthe 'cover is so dimensioned that the ear with the helmet on the head ofthe user is completely enclosed by the cover and lies freely therein.Thereby the ear is sealed against any j noises which might interferewith a clear understanding without a pressure being exerted on the ear.

The shape of the casing las well as the arrangement of the receiver maybe ditlerent from that shown and described. Also the cover may haveanother shape.

What is claimed is:

1. In combination, an aviators helmet having an opening therein, atelephone receiver, holding means for said receiver acoustically sealingone W side thereof, means attaching said holding means to said helmet, acup-shaped member, an opening in the bottom of said member aligned withsaid receiver and means attaching the rim of said member to said helmetwith the open end of said it member facing the interior of said helmetand the cup-shaped part exteriorly of said helmet whereby a receptacleis formed for the ear of the aviator surrounding the same and separatedtherefrom. I 29 2. In combination, an aviators helmet, a lining therein,said helmet and lining having, an .opening therein, a cup-shaped memberhaving a flange at the open end thereof, said cup-shaped memberextending exteriorlyvof said helmet; means hold- 25 ing said flangebetweensaid lining and helmet, a casing, a receiver, means in saidcasing holding said receiver whereby said receiver is acousticallyshielded at one side thereof, and melans attaching said casing to saidhelmet with the other side, of 30 said regeiver adjacent said cup-shapedmember. said member having an opening aligned withsaid receiver.

3. In combination, a helmet member having an ear opening therein, a pairof internested members 35 attached to said helmet, the inner memberbeing shaped to provide an ear receptaclesurrounding and separated fromthe ear of a wearer of said helmet and a receiver held between saidinternested members, said inner member having an 4 opening therein.

the wearer of said helmet, and a receiver between said members, said.outer member acoustically sealing said receiver to said helmet.

KARL WENZKY.

